Author Topic: Which Master Cylinder (Read 619 times)

pprince · « **on:** February, 24, 2011, 06:50:10 AM »

Hi guys,

I bought Versailles rear discs from Darreld. Great brakes and transaction, btw. Thank you Darreld.

I have stock 4 piston front disc brakes. What master cylinder should I replace my single pot with. Do I really even need to change it?

BobV · « **Reply #1 on:** February, 24, 2011, 07:48:54 AM »

Good reference here: http://1985mustanggt.com/Reference/2009-09-19_Mustang_MC_Info.pdf

Basically, it depends on how hard/soft of a pedal you prefer, which is also somewhat influenced by the choice of manual/power brakes too...
In your case/ with 4 piston fronts and the large bore Versailles calipers, I wouldn't go below 1" bore.

Listed from softest pedal/longest travel to hardest pedal/shortest travel:
MC39647 - 1" bore - 1985 Lincoln Towncar (iron or aluminum!)
MC390185 - 1-1/16" bore - 1994 Mustang GT (metric/plastic reservoir)
MC39447 - 1-1/8" bore - Lincoln Mk7 / SVO (iron or aluminum!)
MC36352 - 1-1/4" Bore - 1972 F250 (It's HUGE!)

pprince · « **Reply #2 on:** February, 24, 2011, 08:06:52 AM »

Thanks Bob.

It seems to me my best choice would be the 86 SVO unit, MC39447.

I want the iron unit so it at least sort of looks vintage.

BobV · « **Reply #3 on:** February, 24, 2011, 08:28:32 AM »

Here's what the aluminum version of the SVO M/C looks like installed. Cast iron looks the same, only rust colored!

Fast68back · « **Reply #4 on:** February, 24, 2011, 09:08:50 AM »

The Grabber maverick (302 4v) MC has the ports on the correct side.....

pprince · « **Reply #5 on:** February, 24, 2011, 11:38:44 AM »

lol

The aluminum looks fine. It was not what I was expecting.

pprince · « **Reply #6 on:** May, 13, 2011, 09:17:31 AM »

I got my Mustang back on the road last weekend with the Versailles disc brakes installed.

They went in without a hitch which is really unusual for me. I can screw up pretty much anything I touch :)

I am still using my old single pot master cylinder and it works just fine.